Relativistic cross sections for the K shell ionization of light to heavy atoms by fast electrons are developed using the Moller interaction. The effect of electron exchange and the validity of the Born approximation are discussed. Suitable kinds of wave function for the K electrons are considered. Ionization cross sections are calculated for mercury using Dirac wave functions and for nickel using Darwin wave functions. The cross sections for nickel agree well with experiment. Those for mercury await experimental confirmation.
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H. S. Perlman (1960) studied this question.
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